Sole



FIG. 1 is a perspective illustration of an embodiment of the sole according to my design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a rear plan view thereof;

FIG. 6 is a front plan view thereof; and,

FIG. 7 is a top plan view thereof.

The broken lines shown in FIG. 7 represent the portions of the design that form no part of the claim. 

The ornamental design for a sole, as shown and described. 